Read the following passage and mark the letter A, B, C or D on you answer sheet to indicate the correct answer to each of the questions. 

     As computer use becomes more common, the need for security is more important than ever. One of the greatest security threats in the online world is computer hacking. Computer hacking is the unauthorized access to a computer or network of computers. Hackers are people who illegally enter systems. They may alter or delete information, steal private information, or spread viruses that can damage or destroy files. But how exactly can a hacker get into a system to do these things? 

     Most hackers use information called protocols that are built into computer software. These protocols allow computers to interact with one another. Protocols are sort of like computer police officers. When a computer connects to another system, the protocols check to see if the access is valid. The protocols can also determine how much information can be shared between the two systems. Hackers can manipulate the protocols to get unlimited access to a computer system. 

     In fact, just the act of entering a computer network is considered hacking. This is commonly called passive hacking. Passive hackers get a rush from just being able to access a challenging system like a bank or military network. Another kind of hacker tries to do damage to a system. After hacking into systems, these hackers release viruses or alter, delete, or take information. Known as active hackers, they are, by far, the more dangerous of the two. 

     The easiest way to protect a system is with a good password. Long and unusual passwords are harder for hackers to guess. For even greater security, some online services now use "password plus" systems. In this case, users first put in a password and then put in a second code that changes after the user accesses the site. Users either have special cards or devices that show them the new code to use the next time. Even if a hacker steals the password, they won't have the code. Or if the hacker somehow gets the code, they still don't know the password. 

It is implied in the passage that __________ 

They cannot understand why she did that, it really doesn't add up.

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. 

Read the following passage and mark the letter A, B, C or D on your answer sheet to choose the word or phrase that best fits each other numbered blanks. 

     Trees protect the soil beneath them; thus, tree loss can affect soil integrity. For example, the rain forest floor, home to numerous plant life as well as insects, worms, reptiles and amphibians, and small mammals, relies on a dense covering of branches and leaves to keep it healthy and intact. The canopy of leaves prevents surface runoff by (4) ________ heavy rainfall, so that water can drip down slowly onto the porous earth. Tree roots also stabilize the soil and help prevent erosion. In return, a healthy soil encourages root development and microbial activity, (5) ________ contribute to tree growth and wellbeing. A major factor in cutting forest -related soil damage comes (6) ________ road building, with trucks and other heavy equipment compressing the soft soil, creating furrows where water collects, and disrupting the underground water flow. Eventually, the topsoil erodes, leaving behind (7) ________ infertile layer of rocks and hard clay. 

     Logging can also damage aquatic habitats. Vegetation along rivers and stream banks helps maintain a steady water flow by blocking the entry of soil and other residue, and trees shade inhibits the growth of algae. Removing trees (8) ________ these benefits. When eroding soil flows into waterways, the organic matter within it consumes more oxygen, which can lead to oxygen depletion in the water, killing fish and other aquatic wildlife.

Mrs. John: "How about a small present for little Jimmy after his performance?”

Mr Kelly: “_________________”

Information on events occurring in the theater _________ the year is available through our website.

Mark the letter A, B, C, or D on your answer sheet to indicate the word CLOSEST in meaning to the underlined word in each of the following questions. 

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. 

According to paragraph 2, which information is NOT true about protocols?

Mark the letter A, B, C, or D to indicate the word whose underlined part differs from the three in pronunciation in each of the following questions.

Higher education is very importance to national economies, and it is also a source of trained and educated personnel for the whole country.

_________ he could not say anything.